From the gallery at CathySummers.com.

Photograph by Cathy Summers

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20171102_130_AccentedEdges: Kayaker Surfing at Rocky Island on the Potomac: Great Falls National Park, Virginia - Accented Edges Effect
My Stars = 4

Camera: NIKON D500

1/20 sec. at f/18, ISO 800

200 mm (70.0-200.0 mm f/2.8)